New CR-Touch Ender 3 V2

[unique folio]

Printer: Ender 3 V2. 4.2.2
Mods: Official CR Touch. Minimus Hotend ducts with upgraded fans.
Firmware: MRiscoC 2024
TL;DR: Whats the proper way to enable the CR-Touch on my Ender 3 V2 (MriscoC firmware) in my Gcode to do a FULL 25 point mesh bed level at the beginning of every print?

To long, did read:
I just installed a CR touch on my Ender 3 V2. I am editing my Cura Slicer printer settings to "enable" the the bed level probe through gCode. When I ONLY put in G29 after the G28 line, nothing happens. (I did confirm it saved correctly; when viewing the raw GCode its there). I googled it and someone on GitHub said "When using UBL you need to use 'G29 P1' to build the mesh". After reading the documentation and changing my Cura Printer gCode settings to G29 P1, the printer does a 25 point mesh. But reading the documentation, i now have more questions. AFTER it does the G29 P1 gcode and does mesh routine, is it actually USING the mesh it created? Other people on the internet who are not mentioning G29 P1 , say that they use G29 L0, G29 F10, G29 J, G29 A to activate bed levling. Even more other people say that using G29 alone is enough.. Examples from the official documentation dont say whether i should or shouldnt, but many of their examples DO use G29 A. Even more differenter people just use G29 with nothing else.

My question is: What's the proper way to enable the CR-Touch on my Ender 3 V2 (MriscoC firmware) in my Gcode to do a FULL 25 point mesh bed level at the beginning of every print, and use that new mesh data?

[toxic dove]

AI Help

To enable the CR-Touch on your Ender 3 V2 with the MRiscoC firmware for a full 25 point mesh bed leveling at the beginning of every print, you can use the following G-code sequence:

1. After the G28 line (to home all axes), include G29 P1 to initiate the 25 point mesh bed leveling procedure.
2. To utilize the newly created mesh data, you can follow up with G29 T to load the mesh leveling data. This ensures that the printer applies the mesh corrections during printing.

Using these commands in sequence should enable your printer to perform the full mesh bed leveling procedure and use the resulting data for improved print quality. Remember to save the updated G-code settings in your slicing software such as Cura.

Avoid other variations or additional commands unless specified in the MRiscoC firmware documentation for your specific printer configuration.

WARNING: This response is AI generated and may contain errors.

[unique folio]

That AI thing brings even more questions. No one mentioned G29 Tbefore. and the official documentation makes it seem like G29 T just prints the mesh out to the screen for ME to read it. but I want the printer to read it. 🤔

And without the G29 T, if my reading is right, my printer already shows a cute matrix of the 25 point mesh, with all the values and the option to "Save" or "Continue", which is the same screen as when I navigate the user interface while NOT printing, and run a mesh level wizard.

`M140 S80
M105
M190 S80
M104 S230
M105
M109 S230
M82 ;absolute extrusion mode
M201 X500.00 Y500.00 Z100.00 E5000.00 ;Setup machine max acceleration
M203 X500.00 Y500.00 Z10.00 E50.00 ;Setup machine max feedrate
M204 P500.00 R1000.00 T500.00 ;Setup Print/Retract/Travel acceleration
M205 X8.00 Y8.00 Z0.40 E5.00 ;Setup Jerk
M220 S100 ;Reset Feedrate
M221 S100 ;Reset Flowrate

G28 ;Home
G29 P1;Auto Bed Level

G92 E0 ;Reset Extruder
G1 Z2.0 F3000 ;Move Z Axis up
G1 X10.1 Y20 Z0.28 F5000.0 ;Move to start position
G1 X10.1 Y100.0 Z0.28 F1500.0 E8 ;Draw the first line
G1 X10.4 Y100.0 Z0.28 F5000.0 ;Move to side a little
G1 X10.4 Y20 Z0.28 F1500.0 E15 ;Draw the second line
G92 E0 ;Reset Extruder
G1 Z2.0 F3000 ;Move Z Axis up
G1 X5 Y20 Z0.3 F5000.0 ; Move over to prevent blob squish
G92 E0
G92 E0
G1 F2700 E-5
`

[sturdy nebula]

UBL is the wierd one for leveling, could add a M420 S1 under the g29 to load the mesh (not sure if that ill pull from the previous memory, or the active one you just probed with it), and print a bed leveling print, check the couplers for them to move slightly

[unique folio]

So this guy wrote a dedicated article saying that you dont need to use M420 and G29 together. But hes talking about just regular ol' G29. Not G29 P1. So maybe unrelated? https://the3dprinterbee.com/m420-s1-vs-g29/

[sturdy nebula]

yeah, think you need the G29 P1 with UBL, that post is for the more normal types of leveling

but usualy you pick one or the other correct

[unique folio]

I didnt think of this before, but if i drastically put the bed tram out of whack, I can visually see if the leveling is working 😅

do you still think I need G29 P1 and M420?

[sturdy nebula]

id check with just the G29 P1 and check the z couplers for movement

i just threw in the M420 as a just in case it doesnt

[unique folio]

z couplers? like the stepper motor? feel it for movement?

[sturdy nebula]

this, easer to tell when thats spinning since there is a line already on it

[unique folio]

oh ok yeah. rest my finger up against that.

oh its totally moving. so somethings working!

[sturdy nebula]

other things to check if its still not doing good meshing is checking the x gantry for level and probe offsets are right

[unique folio]

Ok, I can now confirm that G29 P1 alone is NOT applying the mesh. Its just taking the mesh and doing nothing with it.

[sturdy nebula]

ah, more reading, try G29 P1 A

[unique folio]

all in one line, or in 2 seperate lines?

[sturdy nebula]

one line, should Activate the mesh

why is UBL like this

[unique folio]

alright, giving this a try.

[unique folio]

that didnt work. im gonna try:

G29 P1 ;
G29 A;

Then im gonna try after that:

G29 L0 ; Load Mesh stored in Slot 0
G29 F10 ; Set fade height
G29 J ; Check bed tilt at 3 points and adjust mesh accordingly
G29 A ; enable leveling

G29 P1 ;
G29 A;
seems to have worked. doing more testing to confirm.